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Hi, I have a potterton prima 60c boiler connected to a centreplaus c27 timer and a Landis & GYR stat. When I turned the stat down to 'off' it clicked and the 3amp fuse blew. I've tried turning the stat back to on and replacing the fuse but it keeps blowing. Any suggestions? Cheers...

Hi, I've just replaced a Danfoss 102E5 programmer/timer with a Hostmann c27 from screwfix - to program my Potterton Prima boiler I did this as the Danfoss could only work with hot water on or hot water +heating on at the same time but not heating on it's own. Since swapping over the...